Rigid-Flexible Coupling High Ionic Conductivity Polymer Electrolyte for an Enhanced Performance of LiMn2O4/Graphite Battery at Elevated Temperature | |
Hu, Pu1,2; Duan, Yulong1; Hu, Deping1,2; Qin, Bingsheng1; Zhang, Jianjun1; Wang, Qingfu1; Liu, Zhihong1; Cui, Guanglei1; Chen, Liquan3 | |
2015-03-04 | |
发表期刊 | ACS APPLIED MATERIALS & INTERFACES |
卷号 | 7期号:8页码:4720-4727 |
摘要 | LiMn2O4-based batteries exhibit severe capacity fading during cycling or storage in LiPF6-based liquid electrolytes, especially at elevated temperatures. Herein, a novel rigid-flexible gel polymer electrolyte is introduced to enhance the cyclability of LiMn2O4/graphite battery at elevated temperature. The polymer electrolyte consists of a robust natural cellulose skeletal incorporated with soft segment poly(ethyl alpha-cyanoacrylate). The introduction of the cellulose effectively overcomes the drawback of poor mechanical integrity of the gel polymer electrolyte. Density functional theory (DFT) calculation demonstrates that the poly(ethyl alpha-cyanoacrylate) matrices effectively dissociate the lithium salt to facilitate ionic transport and thus has a higher ionic conductivity at room temperature. Ionic conductivity of the gel polymer electrolyte is 3.3 x 10(-3) S cm(-1) at room temperature. The gel polymer electrolyte remarkably improves the cycling performance of LiMn2O4-based batteries, especially at elevated temperatures. The capacity retention after the 100th cycle is 82% at 55 degrees C, which is much higher than that of liquid electrolyte (1 M LiPF6 in carbonate solvents). The polymer electrolyte can significantly suppress the dissolution of Mn2+ from surface of LiMn2O4 because of strong interaction energy of Mn2+ with PECA, which was investigated by DFT calculation. |
文章类型 | Article |
关键词 | Li-ion Battery Polymer Electrolyte Poly(Ethyl Alpha-cyanoacrylate) Limn2o4 |
WOS标题词 | Science & Technology ; Technology |
DOI | 10.1021/am5083683 |
关键词[WOS] | LI-ION ; SPINEL ELECTRODES ; CAPACITY LOSSES ; CELLS ; CATHODE ; DISSOLUTION ; DEPOSITION ; GRAPHITE ; BEHAVIOR ; OXIDES |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Science & Technology - Other Topics ; Materials Science |
WOS类目 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
WOS记录号 | WOS:000353005300034 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.qibebt.ac.cn/handle/337004/6427 |
专题 | 仿生与固态能源系统研究组 |
作者单位 | 1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, Qingdao 266101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China |
推荐引用方式 GB/T 7714 | Hu, Pu,Duan, Yulong,Hu, Deping,et al. Rigid-Flexible Coupling High Ionic Conductivity Polymer Electrolyte for an Enhanced Performance of LiMn2O4/Graphite Battery at Elevated Temperature[J]. ACS APPLIED MATERIALS & INTERFACES,2015,7(8):4720-4727. |
APA | Hu, Pu.,Duan, Yulong.,Hu, Deping.,Qin, Bingsheng.,Zhang, Jianjun.,...&Chen, Liquan.(2015).Rigid-Flexible Coupling High Ionic Conductivity Polymer Electrolyte for an Enhanced Performance of LiMn2O4/Graphite Battery at Elevated Temperature.ACS APPLIED MATERIALS & INTERFACES,7(8),4720-4727. |
MLA | Hu, Pu,et al."Rigid-Flexible Coupling High Ionic Conductivity Polymer Electrolyte for an Enhanced Performance of LiMn2O4/Graphite Battery at Elevated Temperature".ACS APPLIED MATERIALS & INTERFACES 7.8(2015):4720-4727. |
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